In a reflector antenna[?], the relative reduction in the effective aperture of the antenna caused by the masking effect of other antenna parts, such as a feed horn or a secondary reflector, which parts obstruct the radiation path.
... and Gandhian non-violence.
/ Biographical Writings /
1994 - "Leaders From The 60's: A Biographical Sourcebook Of American Activism - David McReynolds" - ...